diff options
Diffstat (limited to 'apt-pkg/deb/debmetaindex.cc')
| -rw-r--r-- | apt-pkg/deb/debmetaindex.cc | 113 |
1 files changed, 62 insertions, 51 deletions
diff --git a/apt-pkg/deb/debmetaindex.cc b/apt-pkg/deb/debmetaindex.cc index 9c7c70784..1afcdf2c0 100644 --- a/apt-pkg/deb/debmetaindex.cc +++ b/apt-pkg/deb/debmetaindex.cc @@ -28,6 +28,57 @@ #include <apti18n.h> +static std::string transformFingergrpints(std::string finger) /*{{{*/ +{ + std::transform(finger.begin(), finger.end(), finger.begin(), ::toupper); + if (finger.length() == 40) + { + if (finger.find_first_not_of("0123456789ABCDEF") == std::string::npos) + return finger; + } + else if (finger.length() == 41) + { + auto bang = finger.find_first_not_of("0123456789ABCDEF"); + if (bang == 40 && finger[bang] == '!') + return finger; + } + return ""; +} + /*}}}*/ +static std::string transformFingergrpintsWithFilenames(std::string const &finger) /*{{{*/ +{ + // no check for existence as we could be chrooting later or such things + if (finger.empty() == false && finger[0] == '/') + return finger; + return transformFingergrpints(finger); +} + /*}}}*/ +static std::string NormalizeSignedBy(std::string SignedBy, bool const SupportFilenames) /*{{{*/ +{ + // we could go all fancy and allow short/long/string matches as gpgv/apt-key does, + // but fingerprints are harder to fake than the others and this option is set once, + // not interactively all the time so easy to type is not really a concern. + std::transform(SignedBy.begin(), SignedBy.end(), SignedBy.begin(), [](char const c) { + return (isspace(c) == 0) ? c : ','; + }); + auto fingers = VectorizeString(SignedBy, ','); + auto const isAnEmptyString = [](std::string const &s) { return s.empty(); }; + fingers.erase(std::remove_if(fingers.begin(), fingers.end(), isAnEmptyString), fingers.end()); + if (unlikely(fingers.empty())) + return ""; + if (SupportFilenames) + std::transform(fingers.begin(), fingers.end(), fingers.begin(), transformFingergrpintsWithFilenames); + else + std::transform(fingers.begin(), fingers.end(), fingers.begin(), transformFingergrpints); + if (std::any_of(fingers.begin(), fingers.end(), isAnEmptyString)) + return ""; + std::stringstream os; + std::copy(fingers.begin(), fingers.end() - 1, std::ostream_iterator<std::string>(os, ",")); + os << *fingers.rbegin(); + return os.str(); +} + /*}}}*/ + class APT_HIDDEN debReleaseIndexPrivate /*{{{*/ { public: @@ -566,26 +617,9 @@ bool debReleaseIndex::Load(std::string const &Filename, std::string * const Erro auto Sign = Section.FindS("Signed-By"); if (Sign.empty() == false) { - std::transform(Sign.begin(), Sign.end(), Sign.begin(), [&](char const c) { - return (isspace(c) == 0) ? c : ','; - }); - auto fingers = VectorizeString(Sign, ','); - std::transform(fingers.begin(), fingers.end(), fingers.begin(), [&](std::string finger) { - std::transform(finger.begin(), finger.end(), finger.begin(), ::toupper); - if (finger.length() != 40 || finger.find_first_not_of("0123456789ABCDEF") != std::string::npos) - { - if (ErrorText != NULL) - strprintf(*ErrorText, _("Invalid '%s' entry in Release file %s"), "Signed-By", Filename.c_str()); - return std::string(); - } - return finger; - }); - if (fingers.empty() == false && std::find(fingers.begin(), fingers.end(), "") == fingers.end()) - { - std::stringstream os; - std::copy(fingers.begin(), fingers.end(), std::ostream_iterator<std::string>(os, ",")); - SignedBy = os.str(); - } + SignedBy = NormalizeSignedBy(Sign, false); + if (SignedBy.empty() && ErrorText != NULL) + strprintf(*ErrorText, _("Invalid '%s' entry in Release file %s"), "Signed-By", Filename.c_str()); } if (AuthPossible) @@ -737,38 +771,15 @@ bool debReleaseIndex::SetSignedBy(std::string const &pSignedBy) { if (SignedBy.empty() == true && pSignedBy.empty() == false) { - if (pSignedBy[0] == '/') // no check for existence as we could be chrooting later or such things - SignedBy = pSignedBy; // absolute path to a keyring file - else - { - // we could go all fancy and allow short/long/string matches as gpgv/apt-key does, - // but fingerprints are harder to fake than the others and this option is set once, - // not interactively all the time so easy to type is not really a concern. - auto fingers = VectorizeString(pSignedBy, ','); - std::transform(fingers.begin(), fingers.end(), fingers.begin(), [&](std::string finger) { - std::transform(finger.begin(), finger.end(), finger.begin(), ::toupper); - if (finger.length() != 40 || finger.find_first_not_of("0123456789ABCDEF") != std::string::npos) - { - _error->Error(_("Invalid value set for option %s regarding source %s %s (%s)"), "Signed-By", URI.c_str(), Dist.c_str(), "not a fingerprint"); - return std::string(); - } - return finger; - }); - std::stringstream os; - std::copy(fingers.begin(), fingers.end(), std::ostream_iterator<std::string>(os, ",")); - SignedBy = os.str(); - } - // Normalize the string: Remove trailing commas - while (SignedBy[SignedBy.size() - 1] == ',') - SignedBy.resize(SignedBy.size() - 1); + SignedBy = NormalizeSignedBy(pSignedBy, true); + if (SignedBy.empty()) + _error->Error(_("Invalid value set for option %s regarding source %s %s (%s)"), "Signed-By", URI.c_str(), Dist.c_str(), "not a fingerprint"); } - else { - // Only compare normalized strings - auto pSignedByView = APT::StringView(pSignedBy); - while (pSignedByView[pSignedByView.size() - 1] == ',') - pSignedByView = pSignedByView.substr(0, pSignedByView.size() - 1); - if (pSignedByView != SignedBy) - return _error->Error(_("Conflicting values set for option %s regarding source %s %s: %s != %s"), "Signed-By", URI.c_str(), Dist.c_str(), SignedBy.c_str(), pSignedByView.to_string().c_str()); + else + { + auto const normalSignedBy = NormalizeSignedBy(pSignedBy, true); + if (normalSignedBy != SignedBy) + return _error->Error(_("Conflicting values set for option %s regarding source %s %s: %s != %s"), "Signed-By", URI.c_str(), Dist.c_str(), SignedBy.c_str(), normalSignedBy.c_str()); } return true; } |